JP2612900B2 - Tape take-up device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for mounting a chip-type electronic component on a substrate in a process of assembling an electronic circuit board, and to a fixed-size winding device for a tape of an electronic component supply unit.

2. Description of the Related Art In recent years, the rate of forming electronic circuits with chip-type electronic components has been increasing. As a result, an automatic mounting machine (chip mounter) for chip-type electronic components has been developed, and various types are used in the market. There are various types of electronic component supply units (part cassettes) for supplying increasingly miniaturized chip-type electronic components, and play an important role in a chip mounter.

Hereinafter, an example of the above-described conventional device for winding a fixed-size tape of a parts cassette will be described with reference to the drawings.

FIG. 2 is an example showing a state in which a chip-type electronic component is taped. In FIG. 2, reference numeral 1 denotes a chip-type electronic component (such as a resistor and a capacitor), and reference numeral 2 denotes a carrier tape that houses the chip-type electronic component 1. Reference numeral 3 denotes a top tape, which is adhered over the upper surface of the carrier tape 2 containing the chip-type electronic component 1.

FIG. 3 is an example showing a tape winding section of a parts cassette for winding the top tape 3 described in FIG.

In FIG. 3, reference numeral 1 denotes a chip-type electronic component, which is taped. 2 is a carrier tape and 3 is a top tape. Reference numeral 4 denotes a winding wheel having a ratchet 5. Reference numeral 6 denotes a first lever, which is mounted coaxially with the take-up wheel 4, has a pawl 7, and engages with the ratchet 5 of the take-up wheel 4 to rotate it. A first spring 8 urges the first lever 6 to pull. 9 is the second
The lever has a U-shape. One end of the lever receives a driving force in the direction of arrow A from the chip mounter main body, and swings about the fulcrum 10. Reference numeral 11 denotes a second spring, which is attached to the other end of the second lever 9 and urges the return to the origin position B when the driving force from the tip mounter body does not act on one end of the second lever as described above. ing.

Further, the second lever 9 is configured to flip up the first lever 6 attached to the same fulcrum in the rotation direction of the arrow C during the swinging movement. When the first lever 6 is lifted up and returned by the first spring 8, the engagement between the ratchet 5 and the pawl 7 causes the winding wheel 4 to rotate in the direction of arrow D. The top tape 3 is wound by rotation of the winding wheel 4. The center diameter of the take-up wheel becomes larger as the top tape 3 is taken up. However, the first lever 6 swings and stops by the slack amount of the top tape 3, so that the take-up wheel having a constant size is always taken up. The quantity is realized.

Problems to be Solved by the Invention However, in the above-described configuration, an unnecessary winding force continues to be applied to the top tape 3 even after the fixed amount of winding has been completed. In addition, there is a problem that the winding force adversely affects the carrier tape 2 that requires high-precision positioning.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a tape fixed-size winding device of an electronic component supply unit that enables stable supply of chip-type electronic components in a high-speed mounting machine.

Means for Solving the Problems In order to achieve the above object, the present invention provides a winding wheel for winding a top tape of a taped chip-type electronic component, and the winding wheel while one end is constantly urged in one direction. A first lever that rotates the winding wheel by engaging with a ratchet formed on the winding wheel only when swinging in the biasing direction, and has one end always in one direction. While being urged, the first lever and the winding wheel are supported so as to be swingable coaxially with the winding wheel independently of each other, and the first lever is only oscillated in a direction opposite to a biasing direction by an external driving force to the other end. A second lever that abuts on and swings with the lever, and operates to prevent rotation of the winding wheel only when the second lever is at a predetermined return position when the external driving force is released. B A tape fixed-length winding device having a rake lever.

Operation As described above, the present invention includes a brake lever that brakes the take-up wheel in conjunction with the second lever, thereby canceling the take-up force after the completion of take-up of a fixed size. Therefore, it is possible to solve the problem of the top tape being broken and the decrease in the positioning accuracy of the carrier tape. Therefore, a stable supply of chip-type electronic components can be realized in a high-speed mounting machine, and the cost and quality of electronic circuit board formation can be improved.

Embodiments Hereinafter, the drawings shown as embodiments of the present invention will be described.

In FIG. 1, reference numerals 1 to 11 are the same as those shown in the conventional example. A brake lever 12 is rotatably supported at a fulcrum 13. When the second lever 9 reaches the origin position B, the brake lever 12 acts on the winding wheel 4 to apply a brake.

Further, a torsion spring is attached to the fulcrum 13 of the brake lever 12, and when the second lever 9 is not at the origin position B, it does not come into contact with the winding wheel 4, so that the braking action does not work.

According to the present embodiment as described above, by providing the brake lever 12 that is interlocked at the origin position of the second lever 9,
Unnecessary winding force can be eliminated.

Effect of the Invention As described above, according to the present invention, by providing the brake lever that cancels the rotational force of the winding wheel at the origin position of the second lever, it is possible to prevent the pulling force from being applied to the top tape after the top tape has been wound. In the chip-type electronic component mounting machine, without breaking the top tape or adversely affecting the positioning accuracy of the carrier tape,
Stable supply of electronic components has been realized. Accordingly, there is an effect of improving cost reduction and high quality of circuit board formation.

[Brief description of the drawings]

FIG. 1 is a side view of a tape winding device showing one embodiment of the present invention, FIG. 2 is a perspective view of a taped chip-type electronic component, and FIG. 3 is a side view of a conventional tape winding device. . DESCRIPTION OF SYMBOLS 1 ... Chip-type electronic component, 3 ... Top tape 4 ... Winding wheel 6 ... 1st lever, 8 ... 1st spring 9 ... 2nd lever, 11 ... 2nd spring 12 ... Brake lever

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Kazuhiko Narusei 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. Mechanical Motion Mechanism "(Showa 43-8-15) Gihodo, p.48

Claims (1)

(57) [Claims] 1. A winding wheel for winding a top tape of a taped chip-type electronic component, and one end of which is always urged in one direction and is supported coaxially with the winding wheel so as to be swingable, A first lever that rotates a winding wheel by engaging with a ratchet formed on the winding wheel only at the time of swinging to the first lever and the winding wheel while one end is constantly urged in one direction; A second lever which is independently supported so as to be swingable coaxially with the winding wheel, and which comes into contact with the first lever and swings together with the first lever only when swinging in a direction opposite to a biasing direction by an external driving force with respect to the other end. And a brake lever that operates to prevent rotation of the winding wheel only when the second lever is at a predetermined return position when the external driving force is released.